Time-controlled device.



C. F. JOHNSON.

TIME CONTROLLI-1D DEVICE.

APPLlcATroN man MAR.29. 1915.

Patented Nov. 30, .1915.

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. To all whom' t may concern.'

um STATES 'rlirinar OFFICE.

canna'. .TonNsoN, or MILWAUKEE, wisconsin.

mina-communi) nnvrcn.

Be it known that I, 'CARL F. vJoHNsori, a citizen of the UnitedStates'residing at Milwaukee, in the county of "lwaukee and State ofWisconsin, have invented certain new and useful Improvements in Time-Controlled Devices, offwhich the following is a specification.

This invention relates to time controlled devices for actuating valves,switches and the like and is generally applicable where -devices of thisnature are used.

The invention provides a device having la vminimum number of parts allsimpleand inexpensive to manufacture. -It permits ready setting of thetime of itsperiodic actuation, and ready adjustment bf the duration ofthe opening or closing Aaction effected by it. It is clock movements andlmposes only a slight load on the clock. l

Broadly stated the device comprisesa lever or other .movable element, aninterrupted, clock-driven stop, coacting therewith to hold the leveragainst movement in certain positions of the stop, and a vspring toactuate the` lever when freed from the stop. The stop convenientlyconsists of the peripheral portion of a disk which is cut away at thedesired point'. Near this point on the disk. 's adjustably mounted aspring. As the disk rotates the end of the lever' enters between thedisk and spring stressing they latter until the rcut-away portion isreached. This frees the lever and the spring shifts it. The continuedrotation of the disk causes the spring to clear the lever which thendrops back under the action 'oi gravity or a secondary spring. Thiscycle is periodically repeated. The preferred form of the invention, asapplied to an admission and exhaust valve, is shown for purposes ofillustration in the accompanying drawing, in which j Figure 1 is a frontelevation of an ordinary clock movement with the invention applied. Thevalve isshown in axial section, and in admission position; Fig. 2 isasimilar view showing the device with the valve in exhaust position; Fig.3 is an enlarged section on the line 3-3 of Fig. 1; Fig. 4 is aperspective View of the actuator arm; and Fig. 5 is an elevation ofacontrol disk adapted to actuate the valve twice in each revolution.

Specification o! Letters Patent.

applicable to ordinary Patented Nov. 3o, 1915.

appnnatlon ala muon es, 191s. serial No. 17,811.

In the drawings 11 represents the frame of an ord1nary clock movementthe nature of whlch is familiar to all skilled in the art. Thls clockmovement has the usualminute hand shaft or arbor 12 (see Fig. 3) but inp lace of the minute handa disk 13 is fric'- tlonally mounted, on thearbor 12. It may be turned on this arbor by means of a squared head 14and such turning is for the purpose of changing the time of actuation ofthe device. The disk '13 vmay thus be set just as. the minute hand ofordinary clocks lis set without affecting the clock movement. a r

The disk 13 has a peripheral projecting annular flange 15 which servesas a stop and which is cut away at 16 for a. distance defpendent on themaximum length of the periodic actuations desired. 4.It is also providedwith a tooth or notch 17 with which a pawl 18 coacts to prevent backwardor counter clock-Wise. turning of the disk.

Swiveled on the hub portion of disk 13 and held in any desired angularadjustment thereon by a cla-mp screw 20 and clamp 21is .an arm 19provided with a bow spring 22.

The bow s ring 22 extends diagonally out*- wardly an rearwardly withreference to the direction of rotation of disk 13 and bears against andYprojects beyond the stop iange 15 Where the latter is cut away at16.

Mounted on the clock frame 11 is a frame or plate 23 carrying a journalpin 24 and a, valve casing 26 having two seats 27 and 28. A valve 29seats alternately against these two' seats and is normally held againstseat` 28 by a spring 30 coiled around its stem 31. When the valve isagainst seat 28 the exhaust'port around stem 31 is closed and -pressureuid coming through tube 32 is vadmitted to the controlled device, notshown, througzh tube 33. When the valve is against seat -2 oit and thecontrolled device is open toexhaust. l

A lever 34 is mounted on pin 24 and has at one end a lug 35 whichnormally bears against the inner side of flange 15. The opposite end oflever 34 carries a screw( 36 which forms an adjustable thrustmemberbearing against stem 31 to actuate valve v,29. A lug 37 on frame 23carries a screw v38 which serves as an adjustable stop for lever 34.

In the useo the device the screw stop 38 the -supply of pressure fluidis cut j This insures the return movement of lever 34-by the action ofspring'30 and avoids the necessity of providing any other means for thispurpose. `In the upright positlon of the device the vw'eightof lever 34will assist this action and alittle lost motion is thus possiblcifdesired to insurc'a more certain seating 'of'valve 29 against yseat. 28.

l/Vith the parts inadjustment andthe disk 13 turning clockwise, the lug35 will enter between flange 15 Vand spring 22 and gradually stress theuntil lug 35 is reached by the cut away. por.- tion. 16 of flange 15when the lug 35 w1ll be overpowers spring 30. This suddenly shiftsAvalve 29 to seat 27 y,to cut off the supply of pressure liuid to thevcontrolled device and.

open this device to exhaust. This condition vcontinues until the end ofspring 22 passes place 22 through collision` with lever 3 4.

lug 35 when spring 30 will restore the parts to ltheir former position.,The spring .19 may be angularly` adjusted to vary the distance lspring22, projects in to the cut away portion 16 and thus vary the time perloddurin'g which lug 35 isheldoutward by the sprin". The pawl 18 .and notch17 are so as tofprevent any backward movement which could causeinjury toThe device shownoperates the valveat one hour intervals. 3 When shorterintervals are desired Aa plurality of springs 22 may be used with a diskhaving a corresponding j to disk 13. .Obviously the sired, be driven ata different rotative speed,l

number of cut away portions as indicated in Fig. 5.y In this arrangementthe springs 22 are simultaneously adjusted with reference disk may, ifdeby any of the means familiar in the art, to secure a similar result.

The device is available to actuate controlling devices generally, suchas other types of valve, electric switches, etc., and in fact any lightdevice requiring sudden and precise periodic actuatio l The simplicityof construction and ease of adjustment are important features. 1

Various other mechanical embodiments of the inventive idea are possible,and I do not limit myself to the precise structure shown except asspeciiied in the claims. For example the forms of the stop and springare subject to considerable variation Without change of function.

The device in the form illustrated is designed particularl to controlthe flushing devices 1na1r was ers.

Having thus described my invention, what I claim is i 1. The combinationoffa controlling device; a movable actuator therefor; a rotary clockdriven member having an interrupted stop adapted periodically to engagesaid aci movable member to abnormal position when spring by forcing itinward, as indicated in Fig. 1. This will continue freed by said stop; tsaid movable member to normal position and means for restoring whenr'eedlby said sprin n 2. The combination ofg a controlling device; amovable actuator therefor; arotary clock driven member having aninterrupted .stop adapted periodically to engage said .acsuddenly forcedkoutward by spring 2 2, thc l- A parts being @proportioned-that spring22 stressed the clock driven member for shifting said movable member toabnormal position when freed by said Stop; means'for restoring. said-movable member to normal position when freed by `said spring; and meansfor adjusting said spring relatively to said clock driven A member;

3. Thev combination of a controlling' device; a movable-actuatortherefor; a rotary clock driven member having an interrupted SPI'mgannular stop adapted periodically to engage said actuator to obstructits movement from normal position; a spring mounted on said clock drivenmember, extending obliquely into the interruption in said stop andadapted to be engaged and stressed by' said actuator as the clock drivenmember rotates, for shifting said actuator when freed by said stop andmeans for restoring said actuator vto normal position when freed by saidspring. Y

4. The combination of a controlling device; a movable actuator.therefor; la rotary clock driven member having an interrupted annularstop adapted periodically to engage said actuator to obstruct its'movement from normal position; a spring mounted on said clock drivenmember, extending obli uely into the interruption in said stop andadapted to be engaged and stressed by said actuator as the clock drivenmemberrotates, for shifting said actuator from normal position whenfreed by said stop; means for adjusting said spring to vary the durationof such shlfting; and means for restoring said actuator to normalposition when freed by sai5d ring.r

combination o f a controlling de` said actuator by the movement'of,

from normal position vice; a. movable actuator therefor; a clockmovement; a disk mounted on onejof the rothereofl from its normalposition; a bowspring mounted at one end on said disk and having theother end projecting rearwardly through the interruption `in saidannular iiange, and adapted to be engaged and stressed by said actuatoras the disk rotates; and means weaker than said spring tending tomaintain said actuator in -normal position.

6. The combination of a controlling 'device; a movable actuatortherefor; a clock movement; a disk mounted on one of the rotatingVarbors of said movement, angularly adjustable thereon, and having aninterrupted annular iange adapted to. engage said actuator to obstructthe movement thereof from its normal position; a bow spring mounted atone end of said disk and having the other end projecting rearwardlythrough the interruption in said annular Hange, and adapted` to' beengaged and stressed by said actuator as the disk rotates; means foradjusting said spring relatively to said ange; and means weaker thansaid spring tending to maintain said actuator in normal position.

7. The combination of a shiftable actuator; an interrupted stop forengaging the actuator to hold the same against shifting; a springmounted on said stop for engaging saidactuator and forcing the samethrough the interruption insaid stop; restoring means for VVsaidactuator weaker than said spring; and means for producing relativemovement of said actuator and stop to cause the actuator to engage andstress said spring, then move through the interruption in said stopunder the action of the spring and then over-travel the spring.

8. The combination of a shiftable actuator; an interrupted'stop forengaging the actuator to hold the same against shifting; a springmounted on said stop for engaging said actuator and forcing the samethrough the interruption in said stop; means for adjusting' the position`of said spring relatively to said stop; restoring means for saidactuator weaker than said spring; and means for producing relativemovement of said actuator and stop to cause the actuator to engage andstress said spring, then move through the interruption in said stopunder the action of the spring and then overtravel the spring. n Intestimony whereof I have signed my name to this specificationin thepresence of two subscribing witnesses.`

, CARL F. JOHNSON.

Witnesses:

B. B. TATUM, J. W. WALLACE,

